Design of an MPEG-based set-top box for video on demand services

摘要

Presents the design of an MPEG-based set-top box for digital video decoding and interfacing with the ADSL-based network or fiber-coaxial network. The architecture of the set-top box consists of three major functional blocks: the central control unit, the digital video decoding unit and the network interface unit. A universal bus is used to connect these blocks and other add-on peripheral modules. Based on this bus, an extension slot is implemented to enhance the design flexibility in supplementing functionality and upgrading performance, such as the improvement from the original 1.544 Mbps T1 interface to a higher throughput network interface in order to provide high quality MPEG 2 video on demand (VOD) services.